[PATCH 03/17] i3c: mipi-i3c-hci-pci: Set drvdata before creating LTR sysfs attribute

[Adrian Hunter]

intel_i3c_init() creates the pm_qos_latency_tolerance_us sysfs attribute
before probe calls pci_set_drvdata().  A userspace write to the attribute
can therefore invoke intel_ltr_set(), which uses pci_get_drvdata(),
before drvdata has been initialized.

Move pci_set_drvdata() before hci->info->init() so drvdata is available
before the sysfs attribute becomes accessible.

Fixes: 884a33131f2a ("i3c: mipi-i3c-hci-pci: Add LTR support for Intel controllers")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
 drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c b/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
index ab595661db1e..af9595009b03 100644
--- a/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
+++ b/drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
@@ -445,6 +445,8 @@ static int mipi_i3c_hci_pci_probe(struct pci_dev *pci,
 	if (ret < 0)
 		return ret;
 
+	pci_set_drvdata(pci, hci);
+
 	hci->info = (const struct mipi_i3c_hci_pci_info *)id->driver_data;
 
 	ret = hci->info->init ? hci->info->init(hci) : 0;
@@ -455,8 +457,6 @@ static int mipi_i3c_hci_pci_probe(struct pci_dev *pci,
 	if (ret)
 		goto err_exit;
 
-	pci_set_drvdata(pci, hci);
-
 	mipi_i3c_hci_pci_rpm_allow(&pci->dev);
 
 	return 0;
-- 
2.53.0